JP2007225409A - Cellular phone and time correction method in cellular phone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cellular phone and a time correction method in the cellular phone allowing time correction easily and surely. <P>SOLUTION: A setting section 7 transmits a correction direction signal directing to perform time correction when the present time reaches a preset time. A control section 2 acquires base station information using a wireless section. A position information detection section 8 detects position information from the acquired base station information. A reception frequency setting section 9 specifies a frequency corresponding to the position information by referring to a reception frequency table 11. A time signal detection section 10 detects a time signal from a broadcast received on the specified frequency and transmits a timing signal. A time correction section 6 corrects a time of a timepiece function section on the basis of the timing signal. This allows to perform time correction easily and surely. Since the time correction is performed using receiving functions for radio broadcasting, TV broadcasting, and one-segment broadcasting provided in the cellular phone, the cellular phone can be simplified in structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile phone and a time correction method in the mobile phone.

  A cellular phone generally has a built-in clock function, but this clock function is not absolute in accuracy, so a time lag occurs. When a time lag occurs, the user must It was necessary to correct.

  This time correction operation will be described with reference to FIG. First, when the user determines that a time lag has occurred in step S301, the user operates the mobile phone to set the time correction mode in step S302, and in step S303, adjusts the time according to the time reference (time signal, etc.). Carry out time correction at work. If time correction is successful in step S304, the time correction mode is manually canceled in step S305, and the time correction operation is terminated. Such manual time correction is troublesome and troublesome for the user.

  Regarding the time correction, a radio timepiece that automatically performs time correction using a standard radio wave is known, and Patent Document 1 listed below discloses that at least a content is included in a search system that searches for broadcast content. Input means comprising storage means for storing time information indicating the broadcast time, communication means for transferring the time information stored in the storage means to the outside, information indicating the content and the broadcast time of the content are associated with each other A search device comprising: a storage means that is stored in the storage means; and a search means that receives the time information transferred by the communication means and searches for information indicating content stored in the storage means based on the received time information. The structure which has is disclosed.

JP 2000-339345 A (pages 12-14, FIG. 11)

  The radio timepiece and the system of Patent Document 1 perform time correction using standard radio waves, and means for receiving standard radio waves is necessary for time correction. There is a problem that the configuration of the mobile phone becomes complicated.

  On the other hand, many mobile phones in recent years have a function of receiving radio broadcasts and television broadcasts, and the configuration can be simplified if time correction can be performed using radio and television broadcast time signals. It is possible. However, radio broadcasts and television broadcasts use different frequencies depending on the region. Therefore, when a mobile phone is used in regions with different frequencies, radio broadcasts and television broadcasts cannot be received. There is a problem that time correction may not be performed.

  The present invention has been made in view of the above problems, and a main object thereof is to provide a mobile phone capable of easily and reliably performing time correction and a time correction method in the mobile phone.

  To achieve the above object, the present invention provides a mobile phone including at least a wireless unit that performs wireless communication via a base station, a receiving unit that receives a predetermined broadcast, and a clock function unit that manages time. When the current time acquired from the clock function unit is a preset time, a setting unit that transmits a correction instruction signal instructing execution of time correction, the correction instruction signal is received, and the wireless unit is used. A control unit that acquires base station information for specifying the base station with which the mobile phone performs wireless communication, and position information for detecting position information for specifying the current position of the mobile phone from the acquired base station information. The receiving unit identifies a frequency corresponding to the detected position information with reference to a reception frequency table in which position information and a broadcast frequency for reporting a time signal are stored in association with each other, and the receiving unit A reception frequency setting unit that sets the reception frequency to the specified frequency, a time signal detection unit that detects a time signal from a broadcast received by the reception unit at the specified frequency and transmits a timing signal, and receives the timing signal And a time correction unit that corrects the time of the timepiece function unit based on the timing signal.

  In the present invention, the time correction unit receives the correction instruction signal, acquires a correction time from the correction instruction signal, and corrects the time of the clock function unit to the correction time based on the timing signal. It can be.

  In the present invention, a plurality of frequencies are registered in the reception frequency table for each piece of position information, and the reception frequency setting unit is configured such that the reception unit cannot receive a broadcast at the specified frequency. The reception frequency of the reception unit may be sequentially set to another frequency based on a preset priority order.

  In the present invention, the predetermined broadcast is preferably one or more broadcasts selected from AM radio broadcast, FM radio broadcast, television broadcast, and terrestrial digital broadcast for portable terminals.

  The method of the present invention is a time correction method in a mobile phone including at least a wireless unit that performs wireless communication via a base station, a receiving unit that receives a predetermined broadcast, and a clock function unit that manages time. When the current time acquired from the clock function unit is a preset time, a first step of transmitting a correction instruction signal instructing execution of time correction, and receiving the correction instruction signal, A second step of acquiring base station information for specifying the base station with which the mobile phone performs wireless communication using the wireless unit, and specifying a current position of the mobile phone from the acquired base station information The third step of detecting the position information and the reception frequency table in which the position information and the broadcast frequency for reporting the time signal are stored in advance in association with each other, and the frequency corresponding to the position information is specified. And a fourth step of setting the reception frequency of the reception unit to the specified frequency, and a fifth step of detecting a time signal from the broadcast received by the reception unit at the specified frequency and transmitting a timing signal; And a sixth step of receiving the timing signal and correcting the time of the timepiece function unit based on the timing signal.

  In the present invention, in the sixth step, the correction instruction signal is received, a correction time is obtained from the correction instruction signal, and the time of the clock function unit is corrected to the correction time based on the timing signal. It can be configured.

  Further, in the present invention, in the reception frequency table, a plurality of frequencies are registered for each position information, and in the fourth step, when the receiving unit cannot receive the broadcast at the specified frequency, A configuration may be adopted in which the reception frequency of the reception unit is sequentially set to another frequency based on a preset priority order.

  As described above, according to the present invention, when the current time reaches a predetermined time, the base station information is acquired and the position information is detected, and the broadcast that notifies the time signal based on the detected position information is received. To identify the possible frequency, detect the time signal from the broadcast received at that frequency, and perform the control to correct the time based on the time signal, the user can easily correct the time without any special operation In addition, the time correction can be surely performed regardless of the region where the mobile phone is located.

  According to the mobile phone and the time correction method in the mobile phone of the present invention, time correction can be performed easily and reliably.

  The reason is that when the current time reaches a preset time, the base station information is acquired using the radio unit, the position information is detected from the acquired base station information, and the time signal is notified from the detected position information. The frequency that can receive the broadcast is specified, the time signal is detected from the broadcast received at the specified frequency, and the time of the clock function unit is corrected based on the time signal, so the user does not have to perform any special operations. This is because time correction can be performed automatically, and even if the mobile phone moves, broadcasts can be reliably received at a frequency corresponding to the destination.

  Further, in the present invention, since the time signal is detected from AM radio broadcast, FM radio broadcast, television broadcast, terrestrial digital broadcast for mobile terminals (so-called 1-segment broadcast), as in the case of using standard radio waves, There is no need to separately provide means for receiving radio waves of a special frequency, and the configuration of the mobile phone can be simplified.

  As shown in the prior art, when a time lag occurs in a clock built in a mobile phone, there is a problem that the user must manually correct the time, and the work becomes complicated. In addition, in order to correct the time using the standard radio wave, a dedicated means for receiving the standard radio wave must be provided, and there is a problem that the configuration becomes complicated. In addition, when correcting the time based on a radio broadcast or television broadcast time signal using a tuner function provided in advance in the mobile phone, the frequency of the broadcast differs depending on the region. There was a problem that time correction could not be performed.

  Therefore, in the present invention, a mobile phone including a wireless unit that performs wireless communication, a receiving unit that receives a predetermined broadcast, and a time function unit that manages time, a setting unit, a control unit, a position information detection unit, and a reception frequency A setting unit, a time signal detection unit, and a time correction unit are provided, the setting unit compares the current time with a preset time, and a correction instruction signal for instructing execution of time correction when the current time reaches the set time When the correction instruction signal is received by the control unit, the base station information is acquired using the radio unit, the position information detection unit detects the position information from the acquired base station information, and is stored in advance in the reception frequency setting unit. Referring to the table, the frequency corresponding to the position information is specified and the reception frequency of the reception unit is set to the specified frequency, and the time signal detection unit detects the time signal from the broadcast received at the specified frequency and outputs the timing signal. Send In the time correcting unit for correcting the time of the clock component based on the timing signal. As a result, even if the user does not perform any special operation, the time can be automatically corrected when the preset time comes, and even if the mobile phone moves, the frequency corresponding to the location can be adjusted. Since it can be used to receive broadcasts, time correction can be performed easily and reliably. In addition, a special means for receiving standard radio waves is provided because time correction is performed using the reception function of AM radio broadcast, FM radio broadcast, television broadcast, and terrestrial digital broadcast for mobile terminals provided in a mobile phone. The mobile phone can be simplified in structure.

  In order to describe the above-described embodiment of the present invention in more detail, a mobile phone according to an embodiment of the present invention and a time correction method in the mobile phone will be described with reference to FIGS. FIG. 1 is a block diagram schematically showing the configuration of a mobile phone according to the present embodiment, FIG. 2 is a flowchart showing a time correction procedure using the mobile phone of the present embodiment, and FIG. It is a flowchart figure which shows the time correction operation | movement in a time correction part.

  In the following description, it is assumed that the mobile phone is provided with a function of receiving AM radio broadcast in advance, and the time signal correction is performed using this AM radio broadcast, but the broadcast used for time correction is AM radio. Not limited to broadcasting, FM radio broadcasting, television broadcasting, terrestrial digital broadcasting for mobile terminals (so-called 1-segment broadcasting), or the like can be used.

  As shown in FIG. 1, the mobile phone 1 of the present embodiment implements time correction by a wireless antenna 3 and a wireless unit 4 that perform wireless communication such as telephone and e-mail, a clock function unit 5 that manages time, and time correction. A control unit 2 that controls the entire mobile phone 1 and acquires information (hereinafter referred to as base station information) for specifying a base station that performs radio communication using the radio unit 4. The position information detection unit 8 that detects information (hereinafter referred to as position information) that specifies the current position of the mobile phone 1 based on the base station information, and the frequency of the AM broadcast that reports the position information and the time signal. Referring to the associated reception frequency table 11, a reception frequency setting unit 9 that specifies a frequency corresponding to the detected position information, a reception antenna 12 and a reception unit 13 that receive and demodulate an AM broadcast of the specified frequency, , Receiver 13 A time signal detection unit 10 that detects a time signal from the received broadcast, a time correction unit 6 that corrects the time of the clock function unit 5 based on the detected time signal, a microphone 15 and a speaker 14 that input / output sound, and an audio circuit unit 16 Etc.

  The clock function unit 5 includes a circuit including an internal oscillator, and has a function of notifying the control unit 2 of the current time.

  The setting unit 7 takes into account the correction execution time table 17 in which the time for performing the time correction (hereinafter referred to as the correction execution time) is registered, the time required for performing the time correction, and the time deviation of the clock function unit 5. The correction execution determination that instructs the start of time correction based on the function of storing the time N (N is 1 to 59 minutes) set in accordance with the correction execution time and the comparison result between the time N and the current time. Means 18.

  In the correction execution time table 17, the correction execution time is registered in units of one hour, and this value can be arbitrarily set. For example, when “6:00” and “15:00” are registered, time correction is performed every day at 6 and 15:00.

  The correction execution determination means 18 determines a time (hereinafter referred to as a correction start time) for starting the correction process from the correction execution time and the time N, and determines whether the current time has reached the correction start time; When the correction start time is reached, the control unit 2 and the time correction unit 6 have a function of sending a signal for instructing the start of correction processing (hereinafter referred to as a correction instruction signal). Specifically, for example, when the correction execution time is “6:00” and the time N is “5” minutes, the correction start time is “5:55” minutes and the current time is “5: When the time reaches 55 minutes, a correction instruction signal is sent to the control unit 2 and the time correction unit 6.

  The wireless antenna 3 and the wireless unit 4 have a function of realizing a telephone call or data communication (Internet connection, electronic mail) using a mobile phone. Further, the mobile phone 1 registers its own position with the base station using the wireless unit 4 and changes the base station to be registered according to movement, thereby enabling a call and communication.

  When receiving the correction instruction signal, the control unit 2 executes control related to acquisition of base station information provided by the communication company (carrier) of the mobile phone 1. Specifically, the mobile phone 1 is configured to register the mobile phone 1 in advance in the base station for wireless communication, and the control unit 2 uses the wireless unit 4, for example, a location on the Internet. The base station information where the position of the mobile phone 1 is registered is obtained from the information server using HTTP (Hyper Text Transfer Protocol), or the base station information is obtained directly from the base station.

  The position information detection unit 8 has a function of acquiring position information for specifying the current position of the mobile phone 1 from the base station information acquired by the control unit 2 using the wireless unit 4. For example, a function of detecting an area code (position information) obtained by dividing the whole country into predetermined areas (for example, area 505) from the acquired base station information and outputting the area code to the reception frequency setting unit 9 is provided. Have. Specifically, when the base station information is composed of “area ID + sub area ID + latitude / longitude information + standard area mesh code”, the area code is acquired from the area ID portion, and the area ID is included in the base station information. If not included, the position is identified from the latitude / longitude information and the area code is acquired from the identified position.

  In the reception frequency table 11, the area code is registered in association with a frequency capable of receiving an AM broadcast that broadcasts a time signal in an area specified by the area code. Note that one area code may be associated with at least one frequency, but a plurality of frequencies may be registered for one area code and a priority order may be set.

  The reception frequency setting unit 9 refers to the reception frequency table 11 to specify a frequency (broadcast station) corresponding to the acquired area code, and sets the reception unit 13 so that radio waves of the specified frequency can be received. Have In addition, when a plurality of frequencies are registered for one area code, the frequency with the highest priority may be selected. When a broadcast cannot be received at the set frequency, the frequency is sequentially set according to the priority. It can also be changed to other frequencies. At that time, if it has a tuner function that can receive broadcasts other than AM broadcasts (for example, FM broadcasts, television broadcasts, 1-segment broadcasts, etc.), multiple types of broadcast frequencies can be set for one area code. If registered, other types of broadcasts can be received even if the reception status of a specific type of broadcast is poor.

  The receiving antenna 12 and the receiving unit 13 have a tuner function for receiving and demodulating radio waves (AM radio) having a frequency set by the receiving frequency setting unit 9. Note that a plurality of reception antennas 12 and reception units 13 may be provided, and a multi-tuner function that can receive AM broadcast, FM broadcast, television broadcast, and the like may be used.

  The time signal detection unit 10 specifies two tone pulses of a specific time signal sound (for example, a forecast sound of 440 Hz and a correct sound sound of 880 Hz in NHK broadcasting) from the data received and demodulated by the reception unit 13. (Sound combined at intervals) is detected, and when this specific time signal is detected, a timing signal is generated. When a specific time signal sound is different depending on the broadcast station, the time signal detection unit 10 may be configured to detect a tone pulse corresponding to the broadcast station. The detection of the time signal is not limited to the tone pulse signal. For example, when the receiving unit 13 supports FM character multiplex broadcasting or television character broadcasting, the time signal included in the broadcast character information is detected. Also good.

  The time correction unit 6 receives a correction instruction signal from the correction execution determination means 18 and shifts to a state in which the time correction is performed, and the timepiece function unit 5 receives the timing signal from the time signal detection unit 10 and manages it. It has a function of correcting the time by converting the value of the minute and second of the time to zero. At that time, if the time of the clock function unit 5 is ahead of the actual time, it can be corrected to the correct time by converting the value of minutes or seconds to zero, but the time of the clock function unit 5 is actually If the time is later than the time, the minute and second values are converted to zero, and the time is corrected to one hour before. Therefore, when the time correction unit 6 receives the timing signal, the correction execution time is determined from the correction instruction signal. And the time of the clock function unit 5 is preferably corrected to the correction execution time.

  In the above configuration, since it is assumed that the frequency of the broadcast for reporting the time signal varies depending on the region, the mobile phone 1 can receive the position information detection unit so that it can be received even when the mobile phone 1 is moved. 8, the reception frequency table 11 and the reception frequency setting unit 9 are provided. However, when a broadcast that broadcasts a time signal at the same frequency throughout the country can be received, the reception unit 13 may receive the broadcast at the above frequency. In this case, the position information detection unit 8 and the reception frequency table 11 may be omitted, and the reception frequency setting unit 9 may set the reception frequency of the reception unit 13 to the above frequency. Further, in FIG. 1, each means is illustrated separately in order to facilitate understanding of the function of the mobile phone of the present invention. However, these means are not necessarily configured separately, for example, the control unit 2 May include the setting unit 7, the position information detection unit 8, the reception frequency setting unit 9, the time correction unit 6, and the like, or the correction execution time table 17 and the reception frequency table 11 may be stored in the same storage unit. Good.

  Next, time correction processing using the mobile phone 1 having the above-described configuration will be described with reference to the flowchart of FIG.

  First, in step S101, the control unit 2 determines whether or not the mobile phone 1 is within range (wireless communication between the wireless unit 4 and the base station is possible).

  If it is determined that it is within the range, in step S102, the correction execution determination unit 18 corrects the correction execution time registered in advance in the correction execution time table 17, and the time N arbitrarily set as the time margin for the time correction. Are used to calculate the correction start time (correction execution time-time N). In step S103, the correction execution determination unit 18 calculates the correction start time and the current time acquired from the clock function unit 5 via the control unit 2. Are compared to determine whether or not the current time is the correction start time, and when the current time is the correction start time, the control unit 2 and the time correction unit 6 are instructed to start the time correction. Send an instruction signal.

  Next, in step S104, the control unit 2 that has received the correction instruction signal uses the wireless unit 4 to connect to the location information server of the mobile phone 1 on the Internet to acquire base station information, Get base station information directly from When the base station information is acquired, the position information detection unit 8 detects an area code (position information) from the acquired base station information, and inputs the detected area code to the reception frequency setting unit 9.

  Next, in step S105, the reception frequency setting unit 9 refers to the reception frequency table 11 stored in advance, identifies the frequency of the radio broadcast at the current position from the input area code, and based on the identified frequency. The receiving unit 13 is tuned (frequency is set).

  At this time, if a plurality of frequencies are registered for each area code, when reception is not possible at the frequency set by the reception frequency setting unit 13 (for example, when the reception state of radio waves at that frequency is poor). The broadcast can be reliably received by sequentially switching the frequencies in accordance with the preset priority order, and the time correction can be more reliably performed. In addition, when the multi-tuner function is installed and the AM broadcast reception state is poor, the broadcast is surely switched by sequentially switching to FM radio broadcast, television broadcast, 1-segment broadcast, etc. in accordance with a preset priority order. Therefore, time correction can be performed more reliably.

  Next, in step S106, the receiving unit 13 receives and demodulates the radio wave having the set frequency. In step S107, the time signal detection unit 10 includes a tone pulse signal indicating the time signal in the demodulated data. Find out if it is. When the time signal detection unit 10 detects the time signal, the timing signal is input to the time correction unit 6, and in step S108, the time correction unit 6 automatically corrects the time of the timepiece function unit 5 based on the timing signal. To do.

  This automatic correction will be described with reference to the flowchart of FIG. 3. In step S201, when the time correction unit 6 receives the timing signal, in step S202, the correction execution time is specified from the correction instruction signal, and is adjusted to the timing signal. Thus, the time of the clock function unit 5 is set to the correction execution time, and the minutes and seconds are set to zero. Alternatively, the time of the clock function unit 5 is corrected to the closest exact time according to the timing signal. For example, if the current time is “14:05”, it is corrected to “14:00”, and if the acquired current time is “14:55”, it is corrected to “15:00”.

  As described above, in the mobile phone of this embodiment, when the current time becomes the correction start time, the base station information is acquired, the position information (area code) is detected from the acquired base station information, and the detected position information is used. A frequency that can receive a broadcast that reports a time signal is identified, a time signal is detected from the broadcast received at that frequency, and the time is corrected based on the time signal, so the user can easily perform the time without any special operation. Correction can be performed, and even if the area code is moved to a different location, the broadcast can be received at a frequency corresponding to the location, so that the time correction can be reliably performed. Further, since no special frequency radio waves (standard radio waves) are used, it is not necessary to provide a means for receiving standard radio waves, and the configuration of the mobile phone can be simplified.

  In the above flow, the time correction is performed when it is determined to be within the range. For example, the position information detected by the position information detection unit 8 and the history information of the frequency set by the reception frequency setting unit 9 are stored in the storage unit. In addition, when it is determined that it is out of the service area, it is possible to refer to the history information and, for example, use the previous position information and frequency, frequently used position information and frequency, etc. to perform time correction. With such a configuration, it is possible to correct the time even when out of the service area.

  The present invention is not limited to a mobile phone, and can be applied to any device having a wireless communication function, a clock function, and a tuner function, such as PHS (Personal Handyphone System) and PDA (Personal Digital Assistance).

It is a block diagram which shows typically the structure of the mobile telephone which concerns on one Example of this invention. It is a flowchart figure which shows the time correction procedure using the mobile telephone which concerns on one Example of this invention. It is a flowchart figure which shows the process sequence of the time correction part of the mobile telephone which concerns on one Example of this invention. It is a flowchart figure which shows the conventional manual time correction procedure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Control part 3 Wireless antenna 4 Radio | wireless part 5 Clock function part 6 Time correction part 7 Setting part 8 Position information detection part 9 Reception frequency setting part 10 Time signal detection part 11 Reception frequency table 12 Reception antenna 13 Reception part 14 Speaker 15 Microphone 16 Audio circuit unit 17 Correction execution time table 18 Correction execution determination means

Claims (8)

In a mobile phone including at least a wireless unit that performs wireless communication via a base station, a receiving unit that receives a predetermined broadcast, and a clock function unit that manages time,
A setting unit that transmits a correction instruction signal instructing execution of time correction when the current time acquired from the clock function unit is a preset time;
A control unit that receives the correction instruction signal and uses the wireless unit to acquire base station information that identifies the base station with which the mobile phone performs wireless communication; and
A position information detection unit that detects position information that identifies the current position of the mobile phone from the acquired base station information;
The frequency corresponding to the detected location information is identified with reference to the reception frequency table in which the location information and the frequency of the broadcast reporting the time signal are stored in advance, and the reception frequency of the reception unit is identified. A receiving frequency setting unit to set the frequency,
A time signal detecting unit for detecting a time signal from the broadcast received by the receiving unit at the specified frequency and transmitting a timing signal;
A mobile phone comprising: a time correction unit that receives the timing signal and corrects the time of the timepiece function unit based on the timing signal.   The time correction unit receives the correction instruction signal, acquires a correction time from the correction instruction signal, and corrects the time of the clock function unit to the correction time based on the timing signal. Item 2. The mobile phone according to Item 1. In the reception frequency table, a plurality of frequencies are registered for each position information,
The reception frequency setting unit sequentially sets the reception frequency of the reception unit to another frequency based on a preset priority when the reception unit cannot receive a broadcast at the specified frequency. The mobile phone according to claim 1 or 2, characterized in that   4. The predetermined broadcast is one or more broadcasts selected from AM radio broadcast, FM radio broadcast, television broadcast, and terrestrial digital broadcast for portable terminals. A mobile phone according to claim 1. A time correction method in a mobile phone comprising at least a wireless unit that performs wireless communication via a base station, a receiving unit that receives a predetermined broadcast, and a clock function unit that manages time,
A first step of transmitting a correction instruction signal instructing execution of time correction when the current time acquired from the clock function unit is a preset time;
A second step of receiving the correction instruction signal and using the wireless unit to acquire base station information for identifying the base station with which the mobile phone performs wireless communication;
A third step of detecting position information specifying the current position of the mobile phone from the acquired base station information;
With reference to the reception frequency table in which the position information and the broadcast frequency for reporting the time signal are stored in association with each other, the frequency corresponding to the position information is specified, and the reception frequency of the reception unit is specified as the specified frequency. A fourth step to set,
A fifth step of detecting a time signal from a broadcast received by the receiving unit at the specified frequency and transmitting a timing signal;
A time correction method for a mobile phone, comprising: at least a sixth step of receiving the timing signal and correcting the time of the timepiece function unit based on the timing signal;   In the sixth step, the correction instruction signal is received, a correction time is acquired from the correction instruction signal, and the time of the timepiece function unit is corrected to the correction time based on the timing signal. The time correction method in the mobile phone according to claim 5. In the reception frequency table, a plurality of frequencies are registered for each position information,
In the fourth step, when the receiving unit cannot receive the broadcast at the specified frequency, the receiving unit sequentially sets the receiving frequency of the receiving unit to another frequency based on a preset priority. The time correction method for a mobile phone according to claim 5 or 6, characterized in that:   8. The predetermined broadcast is one or more broadcasts selected from AM radio broadcast, FM radio broadcast, television broadcast, and terrestrial digital broadcast for mobile phones. A time correction method in the mobile phone according to claim 1.

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